package cn.edu.hpu.utitl;

import java.text.DecimalFormat;





public class LengthUtil {
	public static String fileSize(long size){
		  if(size <= 0) return "0";
		    final String[] units = new String[] { "B", "KB", "MB", "GB", "TB" };
		    int digitGroups = (int) (Math.log10(size)/Math.log10(1024));
		    return new DecimalFormat("#,##0.#").format(size/Math.pow(1024, digitGroups)) + " " + units[digitGroups];
		
	}
}
